/*******************************************************************************
 * Copyright (c) 2004, 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jem.internal.instantiation.impl;
/*
 *  $RCSfile: PTFieldAccessImpl.java,v $
 *  $Revision: 1.3 $  $Date: 2005/08/24 20:20:24 $ 
 */
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.NotificationChain;

import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecore.InternalEObject;

import org.eclipse.emf.ecore.impl.ENotificationImpl;

import org.eclipse.jem.internal.instantiation.*;
import org.eclipse.jem.internal.instantiation.PTExpression;
import org.eclipse.jem.internal.instantiation.PTFieldAccess;
import org.eclipse.jem.internal.instantiation.InstantiationPackage;

/**
 * <!-- begin-user-doc -->
 * An implementation of the model object '<em><b>Field Access</b></em>'.
 * <!-- end-user-doc -->
 * <p>
 * The following features are implemented:
 * <ul>
 *   <li>{@link org.eclipse.jem.internal.instantiation.impl.PTFieldAccessImpl#getReceiver <em>Receiver</em>}</li>
 *   <li>{@link org.eclipse.jem.internal.instantiation.impl.PTFieldAccessImpl#getField <em>Field</em>}</li>
 * </ul>
 * </p>
 *
 * @generated
 */
public class PTFieldAccessImpl extends PTExpressionImpl implements PTFieldAccess {
	/**
	 * The cached value of the '{@link #getReceiver() <em>Receiver</em>}' containment reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getReceiver()
	 * @generated
	 * @ordered
	 */
	protected PTExpression receiver = null;

	/**
	 * The default value of the '{@link #getField() <em>Field</em>}' attribute.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getField()
	 * @generated
	 * @ordered
	 */
	protected static final String FIELD_EDEFAULT = null;

	/**
	 * The cached value of the '{@link #getField() <em>Field</em>}' attribute.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getField()
	 * @generated
	 * @ordered
	 */
	protected String field = FIELD_EDEFAULT;

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected PTFieldAccessImpl() {
		super();
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected EClass eStaticClass() {
		return InstantiationPackage.eINSTANCE.getPTFieldAccess();
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public PTExpression getReceiver() {
		return receiver;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain basicSetReceiver(PTExpression newReceiver, NotificationChain msgs) {
		PTExpression oldReceiver = receiver;
		receiver = newReceiver;
		if (eNotificationRequired()) {
			ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, InstantiationPackage.PT_FIELD_ACCESS__RECEIVER, oldReceiver, newReceiver);
			if (msgs == null) msgs = notification; else msgs.add(notification);
		}
		return msgs;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setReceiver(PTExpression newReceiver) {
		if (newReceiver != receiver) {
			NotificationChain msgs = null;
			if (receiver != null)
				msgs = ((InternalEObject)receiver).eInverseRemove(this, EOPPOSITE_FEATURE_BASE - InstantiationPackage.PT_FIELD_ACCESS__RECEIVER, null, msgs);
			if (newReceiver != null)
				msgs = ((InternalEObject)newReceiver).eInverseAdd(this, EOPPOSITE_FEATURE_BASE - InstantiationPackage.PT_FIELD_ACCESS__RECEIVER, null, msgs);
			msgs = basicSetReceiver(newReceiver, msgs);
			if (msgs != null) msgs.dispatch();
		}
		else if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, InstantiationPackage.PT_FIELD_ACCESS__RECEIVER, newReceiver, newReceiver));
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public String getField() {
		return field;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setField(String newField) {
		String oldField = field;
		field = newField;
		if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, InstantiationPackage.PT_FIELD_ACCESS__FIELD, oldField, field));
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain eInverseRemove(InternalEObject otherEnd, int featureID, Class baseClass, NotificationChain msgs) {
		if (featureID >= 0) {
			switch (eDerivedStructuralFeatureID(featureID, baseClass)) {
				case InstantiationPackage.PT_FIELD_ACCESS__RECEIVER:
					return basicSetReceiver(null, msgs);
				default:
					return eDynamicInverseRemove(otherEnd, featureID, baseClass, msgs);
			}
		}
		return eBasicSetContainer(null, featureID, msgs);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Object eGet(EStructuralFeature eFeature, boolean resolve) {
		switch (eDerivedStructuralFeatureID(eFeature)) {
			case InstantiationPackage.PT_FIELD_ACCESS__RECEIVER:
				return getReceiver();
			case InstantiationPackage.PT_FIELD_ACCESS__FIELD:
				return getField();
		}
		return eDynamicGet(eFeature, resolve);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void eSet(EStructuralFeature eFeature, Object newValue) {
		switch (eDerivedStructuralFeatureID(eFeature)) {
			case InstantiationPackage.PT_FIELD_ACCESS__RECEIVER:
				setReceiver((PTExpression)newValue);
				return;
			case InstantiationPackage.PT_FIELD_ACCESS__FIELD:
				setField((String)newValue);
				return;
		}
		eDynamicSet(eFeature, newValue);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void eUnset(EStructuralFeature eFeature) {
		switch (eDerivedStructuralFeatureID(eFeature)) {
			case InstantiationPackage.PT_FIELD_ACCESS__RECEIVER:
				setReceiver((PTExpression)null);
				return;
			case InstantiationPackage.PT_FIELD_ACCESS__FIELD:
				setField(FIELD_EDEFAULT);
				return;
		}
		eDynamicUnset(eFeature);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public boolean eIsSet(EStructuralFeature eFeature) {
		switch (eDerivedStructuralFeatureID(eFeature)) {
			case InstantiationPackage.PT_FIELD_ACCESS__RECEIVER:
				return receiver != null;
			case InstantiationPackage.PT_FIELD_ACCESS__FIELD:
				return FIELD_EDEFAULT == null ? field != null : !FIELD_EDEFAULT.equals(field);
		}
		return eDynamicIsSet(eFeature);
	}

	public String toString() {
		return super.toString();	// Really want toString to be final at PTExpression, but EMF doesn't allow it.
	}

	/*
	 *  (non-Javadoc)
	 * @see org.eclipse.jem.internal.instantiation.impl.ExpressionImpl#accept0(org.eclipse.jem.internal.instantiation.ParseVisitor)
	 */
	protected void accept0(ParseVisitor visitor) {
		boolean visitChildren = visitor.visit(this);
		if (visitChildren) {
			// visit children in normal left to right reading order
			acceptChild(visitor, getReceiver());
		}
		visitor.endVisit(this);
	}	

} //FieldAccessImpl